Frequently Asked Questions | Gravina's Window Center of Littleton®

Quick Answers About Replacement Windows in Colorado

• Average cost: $2,500 to $3,500 per window with installation, depending on size and configuration
• Best material for Colorado: Fiberglass due to its resistance to expansion and contraction
• Typical project timeline: 12 to 14 weeks from order to installation
• Installation method: W2 employee installers, not subcontractors

Why Choose Gravina's Window Center of Littleton®?

Choosing a window company is not just about the product. It is about who installs it, who stands behind it, and how it holds up in Colorado's climate over the years.

• Serving Colorado since 1973 with three generations of family experience
• W2 employee installers, not subcontractors
• Infinity® by Marvin® fiberglass windows built for Colorado conditions
• In-house service team for long-term support
• Local showroom in Littleton and Denver where you can compare options in person

We are a Colorado-based, family-owned company focused on long-term relationships and doing the job right the first time.

Top Homeowner Concerns, Solved

1. How much do replacement windows cost?

Most replacement windows in Colorado range from $2,500 to $3,500 per window, depending on size, configuration, and installation complexity. Fiberglass windows cost more upfront than vinyl, but they last significantly longer and reduce long-term maintenance and energy costs. (Installed price)

We also offer financing options to make your project more manageable.

2. How do you compare to other window companies?

Many window companies use subcontractors. We do not. Our installers are W2 employees trained to install our products correctly. That means better long-term performance and fewer service calls down the road.

We also provide ongoing in-house service support after installation, which is not something every company offers.

3. What if I am not ready to buy?

No pressure. Most homeowners come to us with questions, not decisions.

Our consultations are built to educate you on what to look for, what tends to fail over time, and what options make the most sense for your home. You can move forward when you are ready.

4. What products are available?

We offer Infinity® by Marvin® fiberglass windows in a wide range of styles, glass packages, and color options, including custom sizes. We also install James Hardie siding and ProVia entry doors.

Our team can help you select products that fit your home's design, your HOA requirements, and your long-term goals.

5. Do new windows actually lower my energy bills?

Yes. Replacing single pane or failed double pane windows with Infinity® by Marvin® fiberglass reduces heat transfer and air leakage, which matters in Colorado's wide temperature swings. Most homeowners see a meaningful drop in heating and cooling costs, though the exact savings depend on your current windows, your home size, and how many windows you replace.

6. Do replacement windows add value to my home in Denver?

Yes. Quality window replacement consistently ranks among the better return home improvement projects for resale, and in the Denver market energy efficient fiberglass windows also help a home show and sell faster. Beyond resale, you gain comfort, lower energy bills, and reduced maintenance for the years you live in the home.

7. Are there tax credits or rebates for energy efficient windows?

Often, yes. Federal energy efficient home improvement tax credits and local Xcel Energy or utility rebates can apply to qualifying ENERGY STAR rated windows. These programs change from year to year, so confirm the current details with the IRS and your utility, and ask your consultant which of our products qualify for the latest incentives.

Product and Installation Expertise

Are Infinity windows made from vinyl?

No. Infinity® by Marvin® windows are made from Ultrex® fiberglass, not vinyl. Ultrex is engineered to handle expansion and contraction without losing structural performance over time.

Do fiberglass windows improve energy efficiency?

Yes. Fiberglass windows reduce heat transfer, minimize drafts, and help maintain more consistent indoor temperatures throughout the year.

Can I install the windows myself?

Professional installation is critical to long-term performance. Our trained installers make sure the windows are set correctly, which protects both performance and your warranty coverage.

What is Ultrex® fiberglass?

Ultrex® is a pultruded fiberglass material developed for strength and durability. It is significantly stronger than vinyl and built to perform in demanding climates like Colorado's.

Are fiberglass windows worth it compared to vinyl?

For Colorado, yes. Vinyl expands and contracts with temperature swings, which leads to seal failure, drafts, and warping over time. Infinity® by Marvin® Ultrex® fiberglass is roughly eight times stronger than vinyl and far more stable in heat and cold. You pay more upfront and replace far less often. You can see a side by side breakdown on our window material comparison page.

Why is fiberglass the best window material for Colorado's climate?

Colorado is hard on windows, with intense high altitude UV, large daily temperature swings, and freeze and thaw cycles. Ultrex® fiberglass barely expands or contracts under those conditions, so it resists the seal failure, warping, and drafts that affect vinyl. That stability is the core reason we install Infinity® by Marvin® fiberglass.

How do Infinity® by Marvin® windows compare to other brands?

Infinity® by Marvin® competes at the premium end on material strength and longevity rather than on lowest price. Its Ultrex® fiberglass is more stable than vinyl and than the composite frames some competitors use. The fair comparison is not just the sticker price, it is the cost over the decades the window actually lasts. We are happy to walk you through the trade-offs honestly.

What window styles do you offer?

We install Infinity® by Marvin® in double hung, casement, sliding, picture, bay, and bow styles, along with specialty shapes, in a range of glass packages, colors, and custom sizes. You can explore the options on our windows page, and our team helps you match each style to your home's architecture and how each room is used.

How do I clean and maintain my windows?

Infinity® by Marvin® fiberglass windows are low maintenance. Clean the glass with a standard glass cleaner and wipe the frames with mild soap and water. There is no painting, staining, or sealing required, because Ultrex® does not rot, warp, or peel the way wood and some vinyl frames do.

Do you offer brochures?

Yes. You can download our product brochure here.

Installation and Project Timeline

How long does the actual installation take?

For most homes the on-site installation takes one to two days, depending on how many windows you are replacing. The longer part of any project is the lead time to custom manufacture your Infinity® by Marvin® windows, which typically runs 12 to 14 weeks from order to installation.

Will you remove or disturb my interior trim during installation?

In most cases, no. The majority of the work happens from the outside, and our installation is designed to be non-invasive, which avoids repainting and re-staining your interior trim. If your trim does need attention for any reason, our W2 employee installers can take care of that too.

What is the difference between full-frame and insert replacement?

An insert, or pocket, replacement fits a new window into your existing frame and is faster and less invasive when the frame is sound. A full-frame replacement removes the old window down to the opening and is the right choice when there is rot, water damage, or you want to change the window size. We recommend the correct method after inspecting your openings.

Is there a minimum number of windows I have to replace?

No. We will come out for a single window or your entire home, whichever you need. You decide how many to do at one time, and we honor your pricing on future windows so you can phase the project over time if you prefer.

What should I expect during a free consultation?

No pressure and no gimmicks. A consultant measures your windows, learns your goals, and explains your options and pricing. Most homeowners come to us with questions rather than decisions, so the appointment is built to educate you on what to look for and what tends to fail over time. You move forward only when you are ready. You can schedule one here.

If I have storm windows, do I still need replacement windows?

Usually, yes. Storm windows block some drafts but rarely deliver real energy savings, and they are hard to clean and tend to trap moisture and pests. Modern Infinity® by Marvin® fiberglass windows seal far better and remove the need for storm windows entirely.

What is the best time of year to replace windows in Colorado?

Any season works. We install year round in Colorado, and our crews replace windows one opening at a time, so your home is never left open to the weather. Because manufacturing lead time runs about 12 to 14 weeks, ordering ahead of your preferred installation season is the main thing to plan for.

Other Common Questions

Do you offer senior or military discounts?

Yes. Let your consultant know during your appointment and we will go over the options available to you.

What warranty comes with your windows?

Infinity® by Marvin® windows carry a limited lifetime warranty on the product, and Gravina's Window Center of Littleton® backs the installation with our own in-house service team. Because we install with W2 employees rather than subcontractors, one accountable company stands behind both the product and the workmanship. You can review our warranty information here.

What if I need service after installation?

We have an in-house service team to support our customers after installation. You can review our warranty information here.

Do you repair windows or doors you did not install?

Our service team focuses on the windows and doors we install, since we stand behind our own products and workmanship. If you are not sure whether we can help with your situation, give us a call and we will point you in the right direction.

Do you install James Hardie siding too?

Yes. Along with Infinity® by Marvin® windows and patio doors, we install James Hardie fiber cement siding and ProVia entry doors. Pairing siding and windows on a single project gives your home a consistent, weather-tight exterior from one accountable installer. You can learn more on our James Hardie siding page.

What areas of Colorado do you serve?

We serve homeowners throughout the Denver metro area from our showrooms in Littleton and North Denver, including Highlands Ranch, Centennial, Aurora, Lakewood, and Arvada, along with surrounding communities. You can see our full service area here.

Are you affiliated with the company on Evans?

No. Gravina's Window Center of Littleton® is a separate, independently owned family business established in 1973.

We are not affiliated with other companies using the Gravina name. We specialize in Infinity® by Marvin® fiberglass window replacement and serve homeowners throughout the Denver metro area.

Researching and Choosing a Window Company

Where can I find unbiased, third-party information on energy efficient windows?

For independent guidance, the Efficient Windows Collaborative, the National Fenestration Rating Council, and ENERGY STAR all publish objective information on window performance ratings. We encourage homeowners to compare any company's claims against those sources before deciding.

Why should I choose a local company over a national chain?

A local, family-owned company is still here when you need service years later. Gravina's Window Center of Littleton® has served Colorado since 1973 across three generations, installs with W2 employees, and supports every job with an in-house service team. That continuity is hard for a national chain or a subcontractor model to match.

Ready to Get Started?

Start by visiting our Littleton showroom or schedule your free consultation today.